Get all Attribute Group of Magento

$attributeSetCollection = Mage::getResourceModel('eav/entity_attribute_group_collection')
 ->load();

foreach ($attributeSetCollection as $id=>$attributeGroup) {
 echo 'set-id: '; echo $attributeGroup->getAttributeSetId().'< br >';
 echo 'group-name: '; echo $attributeGroup->getAttributeGroupName().'< br >';
 echo 'group-id: '; echo $attributeGroup->getAttributeGroupId().'< br >';

}